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प्रश्न
How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal?
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उत्तर
Each ovary produces several immature eggs, which are connected with groups of other cells known as follicles. In humans, only one egg is usually removed at a time; however, two or more may emerge during the menstrual cycle. The egg emerges from the ovary between the 14th and 16th days of the typically 28-day menstrual cycle. Fertilisation of a single egg results in one zygote (monozygotic) that divides into two embryos, forming identical twins. If the twins were born fraternal, two eggs would be released. Fraternal twins (also known as non-identical twins) are typically formed when two fertilised eggs are implanted in the uterine wall at the same time. The two eggs produce two zygotes; hence, these twins are also known as dizygotic or binovular twins.
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संबंधित प्रश्न
Rewrite the terms in the correct order so as to be in a logical sequence.
Sperm duct, penis, testes, sperms, semen.
Differentiate between the following pair:
Uterus and vegina
Name the two types of twins.
The below diagram represents the sectional view of the female reproductive organs of a mammal.
(i) Label the parts numbered 1 to 7.
(ii) What are the main functions of the parts labeled 2, 5, 6?
Give Technical Term:
Name the tube that leads from the ovary to the uterus.
Complete the following sentences with appropriate word:
A hormone secreted in a female to facilitate parturition is ________.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
The cilia lining the oviduct funnel, push the released ovum into the uterus.
State the Location:
Ovary
Complete the table.
| Sex/Gender | Reasons of infertility |
| Female | |
| Male |
Estrogen is secreted by ______
The birth canal is formed by ______.
How many lobes are generally present in each mammary gland?
The part of fallopian tube closest to the ovary is ______.
Identify the odd one from the following.
Ovulation occurs under the influence of ______.
After birth, colostrum is released from mammary glands which is rich in ______.
Lower narrow end of uterus is called ______.
The external genitalia of the human female is called ______.
Read the following and answer from given below:
During copulation, semen is released by the penis into the vegina. The motile sperms swim rapidly, fuse with the ovum in the ampullary region, resulting in fertilization. The haploid nucleus of sperm fuses with that of the ovum to form a diploid zygote.
Site of fertilization in human is ______
In human females, an event that reflects onset of reproductive phase is
Progesterone is secreted by ______.
One mature ovum is released once every ______ days.
______ receives the sperms and acts as a birth canal during childbirth.
What are the functions of the ovaries and uterus in the female reproductive system?
The______ is also called the womb.
List two roles of the Oviduct in the human reproductive system.
Define the following term:
Hymen
The ______ is also called the womb.
